Method of manufacturing well points



W 929 G, E. MIRFILELD 1,709,998

EJETHOB OF MANUFACTURING WELL POINTS Filed Jan. 2, 1925 2 Sheets-Sheet 1 April 23, G. MlRFIELD 1,709,998

METHOD OF MANUFACTURING WELL POINTS Filed Jan. 2, 1925 2 Sheets-Sheet 2 invention is not limited to this class of ser- Patented Apr. 23, 1929.

UNITED STATES 1,709,998 PATENT OFFICE.

GEORGE E. MIBFIELD, OP YOUNGSTOWN, OHIO, ASSIGNOR TO THE YOUNGSTOWN SHEET 6'0 TUBE COMPANY, OF YOUNGSTOWN, OHIO, A. CORPORATION OF OHIO.

METHOD OF MANUFACTURING WELE POINTS.

Application filed January 2, 1925. Serial No. 2;)0.

This invention has to do with improvements in well points and the, method by which. they are manufactured. The invention relates particularly to well points for driven wells, such, as are used in the draining of soil adjacent to foundations, but the vice.

The main object of the ihvention is to provide a Well point which is integral with asection of pipe, preferably perforated for the extrance of the drainage water.

Heretofore it has been customary to make the well point separate and distinct from the pipe section above them, the point being connected to the pipe section by riveting or otherwise. This type of'construction is objectionable for various reasons including'the fact that the point section itself must be shouldered to receive the end of the pipe section, besides which the cost of manufacture and number of manufacturing steps is considerably increased.

The main object of the present invention f is to provide a well point section including not only the point itself, but also the pipe section adjacent thereto, all made a unitary and integral element including not only the pointed end portion, aiso periorated pipe section for the drainage wster. This will greatly increase the strength and durability of the structure, will improve its resistance to shock and damage during the piocess of sinking; it into place, the same time provide a greatly improved art-i cle which is sun .rior othet ways compared to a built up structuife.

coimection with the above it have also devised a method of manufacture to? preducin the artistes above referred to, which meiiod includes various steps of orocess is so worked out that the pie, be very easily and therwise worked into the desiied y induct. 116E objects and uses of the invention will. ".iimfl a detaiied description of the which. consists the features of con- Lid. combinstions of parts hereinzcarwings:; V

Figure It shows a longitadinai section through a portion of plain pipe in its original condition;

Fig. Zshows the pipe section of Fig. 1 as the same. is held in suitable jaws while its operation the outside'diameter of the pipe has also been materially increased; 9

Fig. 4 shows diagrammatically the next step of the process as compared toFig. 2 01 Fig. 3) including the use of a suitable die or drawing together the extreme end portion of the metal and closing the same while at the same time increasing its thickness;

Fig. 5 shows a section through the point after the next step of the process, which consists in drawing down the point by the use of suitable dies which are illustrated diagrammatically in Fig. 6;

Fig. 6 shows a view looking into the dies used in the forming operation which iesults in Fig. 5.

Fig. shows an outside view corresponding to 5;

Figs. 8 and 9 show cross sections on the lines 8-8 and 9--9, respectively, of Fig. 7, looking in the directions tie arsows; and

10 shows view imilar to '1 with the exception that it 1 strates a modified form of construction :i. a- NfliCiZ the upsetting operation is carried to such an extent as to establish a definite shoulder immediately behind the point, Fig. 16 iliustra" the point which resuits from the type o1. upsetting operation illustrated in 3.

l first take a pipe section, preitetabiy of more or less uniform diameter, as shown at 11 in Fig. 1. it next gsip the same in suitabie jaws i2 and 13 some distance behind the estreme end 14; oi this pipe section, then swage or otherwise upset said estreme end a portion so as to reduce its length and. simultaneously increase the thickness of the metal, as cleariy illustrated in Fig. Sometimes this operation is carried to the extent illustrated in Fig. 3 in. which there established This ,will substantially close the-extreme end of the opening oft-he pipe, as shownat 16,be-' sides further increasing the thickness of the metal in the portion 17 This particular op- "erationmaybe' performed by the use of a die i the condition illustrated in Fig. 4.

After the end portion of the pipe has reached the condition of Fig. i, this end portion is drawn out into a somewhat more tapered condition, as illustrated in Fig. 5. This will not only produce moreof a taper in the end portion of the section, but will carry some of the stock beyond the position of the closure 16 so as to establish a solid point 12. The amount of metal inthis point, will, of course, depend upon the manner in which the operation is conducted as well as the angle of the point itself, hut preferably a sutficient amount of metal stock should be carried into the point to give it the necessary strength and body to withstand the work it must perform as the well point is sunk.

' In order to produce the point illustrated in Fig 5 use may he made of a pair of companion female dies 21 and 22 which ma be forced towards each other by a series of. lows in order to gradually bring the stock into the desired condition. Preferably these dies are provided with companion hexagonal surfaces 23, so that a similar finish will be established on onal surfaces taper towards one end of the v dies, as is clearly evident in Fig; 6, and preferably the dies terminate short of the full amount of the taper so as to leave an end opening 24 when the dies are full closed. These dies may be worked along t e metal. of the well point as they are forced towards each other so as to gradually bring the entire point into the desired shape.

As illustrated in Figs. 5 and 7, the pipe section behind the pointis provided with a series of perforations 25 through which the drainage water is received into the bore of the pipe. These perforations preferably commence at a point close behind the position of the tapered point itself.

When shaping up a section of the form illustrated in Fig. 3 into its final condition the shoulder 15 or a material portion thereof will 'be retained at the back end of the tapered point. As a consequence, the size. of the point itself is somewhat larger than that of I the pi for-me in the ground as the pointis forced -down will be somewhat larger than the pipe.

section proper and the opening This will make it easier for the pipe'to follow into'the ground.

end-portion of the pipe section should be reheated prior to the forging operation, illustrated in Figs. 5 and 6. Furthermore, in some cases the use of the forging die, of the form illustrated in Fig. 4, may be eliminated and the end portion of the pipe section, as illustrated in Fig. 2, may be reheated and directly subjected to the forging operation of Figs. 5 and 6. This is particularly true in the case of larger sizes.

It will also be noted that the operations above explained include an upsetting opera.

tion, as illustrated in Fig. 2 or Fig. 3, a closing operation, as illustrated in Fig. 4, and a drawing out operation, as illustrated in Figs. 5 and 6.

While I have herein shown and described only certain embodiments of the feature of my present invention, and also only certain steps of a process for practicing the invention, still it will be understood that I do-not intend to limit myself to the same, except as I may do so in the claims.

. I claim: Y

1. The process for the manufacture of a well point which consists in first backwardly swaging the end portion of a uniform cylindrical tube to reduce its length and simultaneously increase-the thickness of its metal, thereafterreducin the size of said end portion and tapering the same and substantially closing the passage therethrough, thereafter reheating the end portion, and thereafter forging the reheated ;end portion to elongate the same into the forin of a solid tip and establish the desired exterior taper substantially as described.

2. The process for the manufacture of a well point which consists in first backwardly swaging the end portion of a uniform cylindrical tube to reduce its length and simultaneously increase the thickness of its metal, and establish an exterior rearwardly facin shoulder at the back side of the swaged en portion, thereafter forcing the swaged end portion longitudinally into the tapered socket of a female die for the purpose of further reducing the size of said end portion and tapering the same and substantially closing the assage therethrough, thereafter reheatmg t e end rtion, and thereafter forging the reheate end portion to elon to the same into the form of a solid tip an establish the desired exterior taper, substantially as described.

3. The process for the manufacture of a well point which consists in first backwardly swagmg the end portion of auniformoylindrical tube to reduce its length and simul- III sage therethrough, and thereafter forging the reheated end portion to elon ate the same into the form of a solid tip an establish the desired exterior taper, substantially as described.

4. The process for the manufactureof a well point which consists in first backwardly swaging the end portion of a uniform cylindrical tube to reduce its length and simul- 'backwardly into conically extendin walls of diminishing thickness to the line 0 mergence with the tube, substantially as described.

5. The process for -the manufacture of a well point which consists in first backwardly swaging the end portion of a uniform eylin-,

drical tube to reduce its length and simultaneously progressively increase the thickness of the metal toward the end thereof, thereafter progressively reducing the. ex-

terior cross dimensions of said end portion, and tapering the same to bring the thickened terminal portion into closed relation, thereafter reheating the end portion, and thereafter forging the reheated end portion to elongate the same and taper out the same into a solid tip portion merging backwardly into conically extending walls of diminishing thickness to the line of mergence with the tube, and to give to the exteriorof the point a tapering polygonal formation, substantially as described.

6. The process of manufacturing well pomts comprising swaging the end portion of a cylindrical tube to reduce its length and 4 simultaneously increasing the thickness of its metal, and thereafter forging the said thickened end portion to a closed point.

7. The process of manufacturing well points comprising swagin the end portion of a cylindrical tube to re uce its length and simultaneously increase the thickness of its metal substantially uniformly throughout said end portion, and thereafter forging said thickened end portion from the thickened 55 inner end to the outer edge to a closed point to gradually increase the thickness of metal towards the closed point.

GEORGE E. MIRFIELD. 

